soulcutter

require "delegate"

Foo = Class.new(SimpleDelegator)
Bar = Struct.new(:foo)

Foo.new(1) == Foo.new(1) # => true

Bar.new(1) == Bar.new(1) # => true
Foo.new(Bar.new(1)) == Foo.new(Bar.new(1)) # => false

soulcutter

# frozen_string_literal: true

require "delegate"
require "set"

# Hash that can only hold a certain number of keys, keys expire on a LRU basis
class BoundedHash < DelegateClass(Hash)

  NO_OP = proc {}

soulcutter

RSpec::Matchers.define :be_uniq do
  match do |actual|
    values_match? actual.uniq, actual
  end

  failure_message do |actual|
    diff = actual.dup
    actual.uniq.each { |value| diff.delete_at diff.index(value) }
    diff = diff.uniq
    "expected that #{actual.inspect} to be uniq, but found the following repeated elements: #{diff.inspect}"

soulcutter

module Fluent
  def fluent_accessor(*attr_names)
    attr_names.each do |attr_name|
      define_method attr_name do |*val|
        return instance_variable_get("@#{attr_name}") if val.empty?
        raise ArgumentError, "Expected 0..1 arguments, got #{val.size}" if val.size > 1

        value = val.first
        value = yield(value) if block_given?
        

soulcutter

ternary = foo ? !bar : bar
xor = !!(foo ^ bar)
neq = foo != bar

foo   | bar   | xor   | ternary | neq 
-------------------------------------
true  | true  | false | false   | false
false | false | false | false   | false
true  | false | true  | true    | true
false | true  | true  | true    | true

soulcutter

var _ = require('lodash');
var Q = require('q');
var AWS = require('aws-sdk-q');

function SnsPublisher(topic, options) {
  var topicOptions = {
    params: {
      TopicArn: topic
    }
  };

soulcutter

def days(range)
  Enumerator.new do |yielder|
    now = range.begin
    begin
      yielder << now if now <= range.end
    end while (now = now + 1.day) <= range.end
  end
end

days((Time.now - 3.days)..(Time.now)).each { |day| puts day }

soulcutter

# transaction/truncation strategies won't work when you have a
# capybara feature and you must preserve what's already in the
# database
#
# Usage: 
# include TrackedLet
#
# track(:foo) { User.create }
# track!(:foo) { User.create }
# specify { expect(track(User.create)).to be_persisted }

soulcutter

require "active_support/core_ext"
require "delegate"
require "mailchimp"
require "singleton"

class MailingList::MailChimp
  attr_reader :user, :member_info

  def initialize(user, member_fetcher = member_info_api)
    @user = user

soulcutter

require "delegate"
require "singleton"

module MailingList
  class SafeResponse < SimpleDelegator
    def self.safe_delegate(*methods)
      methods.each do |method|
        define_method(method, ->(*args, &block) {
          value = __getobj__.send(method, *args, &block)
          value ? SafeResponse.new(value) : BlackHole.instance